Petr Charvát created TAP5-1934:
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Summary: Kaptcha Component throws NPE after session is expired
Key: TAP5-1934
URL: https://issues.apache.org/jira/browse/TAP5-1934
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-kaptcha
Affects Versions: 5.3.2
Reporter: Petr Charvát
Priority: Minor
A have a page with kaptchaField and Kaptcha image - OK.
The page is renered under URL e.g. http://localhost:8080/myapp/registration -
OK.
But if the bad user (robot) hit url with
http://localhost:8080/myapp/registration.kaptcha:image after the session is
expired, NPE it thrown - NOK.
How to protect the page?
Caused by: org.apache.tapestry5.runtime.ComponentEventException [at
context:Registration.tml, line 24]
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1130)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$3200(ComponentPageElementImpl.java:61)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1051)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1048)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
... 70 more
Caused by: java.lang.NullPointerException
at
com.google.code.kaptcha.text.impl.DefaultWordRenderer.renderWord(DefaultWordRenderer.java:55)
at
com.google.code.kaptcha.impl.DefaultKaptcha.createImage(DefaultKaptcha.java:43)
at
org.apache.tapestry5.kaptcha.internal.services.KaptchaProducerImpl.createImage(KaptchaProducerImpl.java:57)
at $KaptchaProducer_b9452c5536c8e.createImage(Unknown Source)
at
org.apache.tapestry5.kaptcha.components.KaptchaImage.onImage(KaptchaImage.java:90)
at
org.apache.tapestry5.kaptcha.components.KaptchaImage.dispatchComponentEvent(KaptchaImage.java)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:923)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1106)
... 74 more
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